CN102778802B - Light quantity adjustment apparatus, lens unit and optical apparatus provided with the same - Google Patents

Abstract

A plurality of blade members is overlapped and disposed in the shape of scales in a ring-shaped board having an optical-axis aperture at the center, and is held from above by a driving ring so that each blade member performs open/close motion. At this point, an elastic member is disposed between the blade members and the board to press each blade member against the driving ring side, or an elastic member is disposed between the blade members and the driving ring to press the blade members against the board side, and in this state, the blade members are opened and closed.

Description

Light amount adjusting device, lens subassembly and it is provided with the optical device of the lens subassembly

Technical field

The present invention relates to a kind of light amount adjusting device, is mounted in the shooting dress such as video camera, photographing unit in the light amount adjusting device Put or the projection arrangement such as projector in, the light quantities such as pinch shadow light quantity, projection light quantity are adjusted.

Background technology

Commonly known this kind of light amount adjusting device is in a pinch shadow light path（Or projecting light path）Upper configuration has optical axis opening Substrate, is opened and closed on this substrate and configure freely multi-disc light quantity and adjust blade, makes optical axis opening for heavy caliber or small-bore enters Row light quantity is adjusted.

For example in Japanese Unexamined Patent Publication 2009-020438 publications（Patent documentation 1）In disclose a kind of iris device, should Iris device defines optical axis opening on substrate, and around the optical axis opening more blades are configured, from minor diameter to Major diameter is opened and closed by similar figures to light path bore.Such iris apparatus are known with rotund by connecing by multiple blades Bore carries out the feature of light quantity adjustment multistagely.

In the publication, a kind of switching mechanism is disclosed, the switching mechanism configures many between upper and lower a pair of ring-types substrate Individual aperture blades, upper and lower a pair of ring-types substrate has optical axis opening in central authorities, by the driving being arranged on a side of substrate Device is opened and closed to this multiple aperture blades.

In addition, in Japanese Unexamined Patent Publication 2006-322979 publications（Patent documentation 2）In disclose such a device, the dress Put and be formed as configuring multiple aperture blades between the substrate of ring-type in the same manner as patent documentation 1, by the drive of the side for being located at substrate Dynamic device makes blade be opened and closed movement.

Multiple blades are configured in squamous so around optical axis opening, by the driving means being arranged on a side of substrate Mobile device is opened and closed, is public well understood.

Multiple blades are opened and closed with mobile mechanism guide groove is set along the movement locus of blade on substrate, in this guide groove In be fitted together to by pin of the implanting on blade, the transmission ring from the substrate for being located at the opposing party makes blade turn to prescribed direction It is dynamic, so as to limit the motion of multiple blades.For this purpose, on the substrate supported to blade, by the piece number with blade Corresponding guide groove is configured in the periphery of optical axis opening.The structure of this guide groove is disclosed by Fig. 4 of patent documentation 1.

The content of the invention

It is right as in the multiple blades of periphery configuration of optical axis opening, making this each blade rotate predetermined angular as described above The device of size adjustment is carried out by light quantity, it is open by patent documentation 1,2 etc..In this occasion, its structure adopts such machine Structure, i.e. upper and lower a pair of substrates have optical axis opening in central authorities, are carried out to multiple vane members with axle between upper and lower a pair of substrates Supporting, is opened and closed by built-in driving ring between the substrates to this each blade.

In addition, its structure is constituted in such a way, i.e. on substrate, overlap in squamous by the end for making to adjoin each other Mode arrange multiple vane members in circumferencial direction, this each vane member is rotated towards same angle direction by driving ring and right Opening diameter carries out size adjustment.

Therefore, the end for adjoining each other of multiple vane members overlaps each other, in the closing direction of blade（Fully closed direction） Change in the way of overlapping area becomes larger, in the opening direction of blade（Standard-sized sheet direction）By the side that overlapping area is tapered into Formula changes.And, according to blade composition piece number difference, sometimes the lamination layer number of blade corresponding to adjustment light quantity and change.

In Figure 14 and Figure 15, the blade construction of 7 compositions is represented, in the substrate 101 with optical axis opening 100 and pressing plate Between 104,7 vane members 103 are arranged in the way of making neighbour set end overlapping in circumferencial direction.Figure 14 A represent little smooth round The overlapping flat shape of state, Figure 14 B represent section constitution.As shown in Figure 14B, of vane member 103 and adjacent blade Divide overlapped.

That is, the occasion for having overlapped in squamous in the vane member of 7 compositions, as shown in Figure 14 A, such as vane member 103b Become the state of the downside for overlapping on vane member 103a, being inserted in vane member 103c, this relation is even with most The 7th vane member 103g for having overlapped afterwards, is also to become vane member 103g to overlap on vane member 103f, be inserted in The state of the downside of initial vane member 103a.This relation becomes phase by overlapping the vane member of n pieces composition in squamous Together.

Therefore, in driving ring and substrate（Seat board）Between in squamous overlapping, configuration vane member, by shown in Figure 14 A Under little aperture state as represented with the section constitution of Figure 14 B, in the peripheral part of optical axis opening 100 blade structure is become Part 103a, vane member 103b, 3 states for having overlapped of vane member 103c.Therefore, between driving ring 102 and substrate 101 Set every clearance dcs of the L according to required for maximum superimposed sheets number n, the thickness s of vane member, the on-off action of each vane member It is fixed.For example the interval is set as L≤ns+ndc.

However, under aperture Full-open state shown in Figure 15 A, as the section constitution by Figure 15 B is represented, becoming leaf The state that this 2 outer peripheral edges in optical axis opening 100 of sheet element 103a, vane member 103b overlap.So in substrate 101 and drive The overlapping area and superimposed sheets number that the vane member for clamping is subject between rotating ring 102 changes corresponding to the amount of opening of optical axis opening Become.For this purpose, vane member is in driving ring and substrate（Seat board）Between have it is sizable spatially configure, produce following asking Topic.

Driving ring 102 and each vane member 103, arrange pin-shaped projection, in the opposing party in the way of being mutually clamped in a side Slotted eye is set, by the rotation of driving ring each vane member is moved openingly and closingly.At the same time, in seat board 101 and each vane member Between also pin-shaped projection is set in a side in the way of being mutually clamped, in the opposing party, slotted eye is set.This 2 slotted eyes are pressed along each blade Opening and closing track the mode that it is guided is formed.

In such composition, substrate（Seat board）Set corresponding to Maximum overlap piece number with the interval of driving ring, The superimposed sheets number of each vane member changes corresponding to amount of opening.For this purpose, become such vane member constituting, i.e. such as Figure 14 B The vane member leading section side of optical axis opening central side like that becomes 3 overlaps, and the base end part side as Figure 15 B becomes 2 weights It is folded.

Therefore, in the occasion for becoming little aperture state shown in Figure 14 A, the vane member leading section side of 3 overlaps is become Lifted by the vane member leading section of other vane members as shown in Figure 8, each vane member is from base end part towards leaf Sheet element leading section is upturned, just inclines as the vane member 103a of Figure 15 B.In addition, becoming by Figure 15 A tables The occasion of the aperture Full-open state shown, as by as shown in Figure 15 A, vane member is in driving ring and substrate（Seat board）Between such as The vane member 103a of Figure 15 B is inclined like that.The inclination of this vane member, because the fastening state of pin-shaped projection and slotted eye becomes Change, the opened and closed positions of vane member offset as shown in figure 15 c, as a result, there is the change of aperture bore, light quantity becomes uneven Problem.Spy is that the impact to light quantity inhomogeneities under little aperture state is big.

The present invention be exactly Given this problem points and make, its object is to provide a kind of inclination of suppression vane member, Light quantity inhomogeneities are little and can carry out the light amount adjusting device of appropriate spectrum assignment.

In order to achieve the above object, it is a feature of the present invention that overlapping in squamous between the substrate and driving ring of ring-type Multiple vane members are configured, the substrate of the ring-type has optical axis opening, by driving ring each vane member is opened and closed in central authorities It is mobile.Now, in the elastomeric member configuration that the plurality of vane member stands facing each other between vane member and substrate and to drive Rotating ring side has been pushed in the state of each vane member, or in the elastomeric member configuration that will be stood facing each other with the plurality of vane member in leaf Push in the state of vane member between sheet element and driving ring and to substrate-side, movement has been opened and closed to vane member.

By so composition, each vane member is made near substrate or driving ring side by elastic component, so as to suppress for example to exist Each vane member is from base end part end portion upward warp and the inclination of caused each vane member, Yi Ji forward under little aperture state The inclination of each vane member, prevents by the inclination of vane member caused by the posture of camera head changes under aperture Full-open state The change of the aperture bore for causing, can be set to there is no the irregular appropriate aperture bore of bore.

The method for applying elastic force to above-mentioned elastic component, adopts and constitutes elasticity by the thin plate of metal, synthetic resin etc. Component, makes the elastic component bending and applies what vane member was pushed by the stage portion on being located at substrate or driving ring The method of elastic force, or setting cuts flexure strip on elastic component, this is cut flexure strip flexural deformation and is applied elastic force Method.

In addition, the 1st the 2nd pin-shaped projection is integrally formed at the table back side of above-mentioned multiple vane members, by the 1st the 2nd Projection is entrenched in the 1st the 2nd slotted eye on being formed on substrate and driving ring.Now, the 3rd is arranged on above-mentioned elastic component （4th）Slotted eye, is fitted together to pin-shaped projection.Now, the diameter of the slotted eye of elastic component is set to than the 1st（2nd）The diameter of slotted eye It is little.

So, the pin-shaped projection being formed on each vane member is moved in its base end side by the slotted eye of elastic component Limit so that do not interfere with 1st 2nd slotted eye bigger than this slotted eye width the front of pin-shaped projection, it is ensured that round and smooth action.

In more detail, it is that dress is adjusted to the light quantity being adjusted by light quantity of optical axis opening by multiple vane members Put, the light amount adjusting device possesses substrate 11, multiple vane members 21, driving ring 31 and the driver element M of ring-type；The ring The substrate 11 of shape has optical axis opening 12 in central part；The plurality of vane member 21 is configured in around optical axis opening 12, is being justified Circumferential direction is overlapped in squamous, configures in the way of optical axis opening is covered；The driving ring 31 is more to clip between substrate The mode of individual vane member is configured, and to each vane member movement is opened and closed；Driver element M makes the driving ring with optical axis opening Centered on rotate.In addition, arranging the elastic component 15 with the face-off of multiple vane members, the bullet between substrate 11 and driving ring 31 Property component 15 is configured between substrate 11 and vane member 21, and each vane member 21 is pushed to the side of driving ring 31, or It is configured between driving ring 31 and vane member 21, by with the elasticity pushed to each vane member 21 to the side of substrate 11 The mode of power is constituted.

In addition, the elastic component 15 being configured between substrate 11 and vane member 21 constitutes the shape being substantially the same with substrate 11 Shape, forms the 3rd slotted eye with the same general shape of the 1st slotted eye 13 of substrate 11, be configured in driving ring 31 and vane member 21 it Between elastic component 36 constitute the shape being substantially the same with driving ring 31, formation is substantially the same with the 2nd slotted eye 37 of driving ring 31 4th slotted eye of shape.

In addition, in order to achieve the above object, the light amount adjusting device of technical scheme 12 is recorded in by ring-type Substrate, more blades component, driving ring and driver element are constituted；The substrate of the ring-type has optical axis opening in central part；Should More blades component is configured in around the optical axis opening, is overlapped in squamous in circumferencial direction, to optical axis opening by light Amount is adjusted；The driving ring to clip the more blades component between the substrate in the way of configure, to each blade Component is opened and closed movement；The driver element makes the driving ring rotate centered on the optical axis opening；Wherein：The multi-disc leaf Each vane member of sheet element is made up of base end part and blade part；The base end part be located at the optical axis opening outside, with respectively with The substrate and a pair of fulcrums of driving ring engaging；The blade part is retreated relative to the optical axis opening, forms aperture openings； Possess between the substrate and driving ring the base end part of each vane member is entered to the substrate-side or driving ring side Row pushes the Flexible element of force.

The present invention overlaps multiple vane members on substrate in squamous, and the substrate has optical axis opening in central authorities, by when by Driving ring makes elastic component when moving openingly and closingly the plurality of vane member along the opening and closing track of regulation between substrate and driving ring Arrange with the state of each vane member face-off, it is each by being pushed to the driving ring in opposition side or substrate that face from elastic component The mode of vane member is constituted, thus it is possible to obtain following effect.

Overlapped multiple vane members are in the base supported to the plurality of vane member in the way of it can be opened and closed The gap bigger than the overlapped thickness of vane member is formed between plate and driving ring, even if each vane member is in this substrate and driving For instance in little aperture state in the gap of ring, each vane member from base end part will forward end portion upward warp and make each blade structure Part is inclined, in addition, even at aperture Full-open state, the postural change of camera head will be such that each vane member inclines, is led to Cross the inclination by elastic component to each vane member to suppress, each vane member of opening and closing also will not be inclined significantly.Cause This, vane member will not occur and substrate and driving ring has been formed on pin-shaped projection and slotted eye clamped position incline and draw The position skew for rising, thus it is possible to the aperture bore formed by vane member is set as into appropriate value, carries out appropriate light quantity and adjusts It is whole.

In addition, in the present invention, substrate and driving ring is made to be transported with vane member when pin-shaped projection engages with slotted eye During dynamic connection, the 3rd slotted eye with pin-shaped protrusions snap is set on elastic component, by the 1st the 2nd slotted eye than substrate or driving ring The mode for more closely engaging forms the 3rd slotted eye.So, by elastic component near the base end part of the pin-shaped projection of vane member The supporting of the 3rd slotted eye such that it is able to do not have with errors being adjusted by light quantity to optical axis opening by correct movement locus.

In addition, the light amount adjusting device for being recorded in technical scheme 12 possesses elasticity between substrate and driving ring Unit, the Flexible element to substrate-side or driving ring side exert a force to each vane member being made up of base end part and blade part；The base End is located at outside optical axis opening, with a pair of the fulcrums for engaging with the substrate and driving ring respectively；The blade part is relative to light Axle opening is retreated, and forms aperture openings；In addition, base end part of the Flexible element to substrate-side or driving ring side to each vane member Force；For this purpose, following effect can be obtained.

Overlapped multiple vane members are in the base supported to the plurality of vane member in the way of it can be opened and closed The gap bigger than the overlapped thickness of vane member is formed between plate and driving ring, even if each vane member is in this substrate and driving For instance in little aperture state in the gap of ring, each vane member from base end part will forward end portion upward warp and make each blade structure Part is inclined, in addition, even at aperture Full-open state, the postural change of camera head inclines will each vane member, pass through Suppressed by inclination of the elastic component to each vane member, the base end part of each vane member of opening and closing also will not significantly incline Tiltedly.Therefore, the pin-shaped projection and slotted eye on a pair of fulcrums of each vane member will not occur and substrate and driving ring has been formed in Clamped position incline and cause position skew, thus it is possible to the aperture bore formed by each vane member is set as fitting Work as value, carry out appropriate light quantity adjustment.

Description of the drawings

Fig. 1 is the explanatory diagram of the three-dimensional composition for representing one embodiment of the present invention.

Fig. 2 is the 1st substrate in the device of Fig. 1（Seat board and elastic component）With the structure explanation being exaggerated of blade group Figure.

Fig. 3 is the 2nd substrate in the device of Fig. 1（Pressing plate and driving ring）The structure explanatory diagram being exaggerated.

Fig. 4 A are the 1st substrate in the device for represent Fig. 1（Seat board）Shape explanatory diagram, Fig. 4 B for represent elastic component Shape explanatory diagram.

Fig. 5 is the explanatory diagram of the vane member shape in the device of Fig. 1, and Fig. 5 A represent that shape is decomposed in the assembling of vane member State, Fig. 5 B represent the section constitution of vane member, and Fig. 5 C are the explanatory diagram of the opening and closing track of vane member.

Fig. 6 is the explanatory diagram for representing driving ring and the relation of vane member, and Fig. 6 A represent the global shape of driving ring, Fig. 6 B For the amplification explanatory diagram for wanting portion of driving ring.

Fig. 7 is the explanatory diagram of the effect of the embodiment of Fig. 1, and Fig. 7 A become aperture full-gear for vane member（Standard-sized sheet Put bore）Overlap condition explanatory diagram, Fig. 7 B for section state explanatory diagram（The a-a line sectional views of Fig. 7 A）.

Fig. 8 is the explanatory diagram of the effect of the embodiment of Fig. 1, and Fig. 8 A become little aperture state for vane member（Minimum light Circle mouth footpath）Overlap condition explanatory diagram, Fig. 8 B for section state explanatory diagram（The b-b line sectional views of Fig. 8 A）.

Fig. 9 is the explanatory diagram of the driving means of the device of Fig. 1（Median vertical section figure）.

Figure 10 is to represent the embodiment different from Fig. 1（2nd embodiment）Three-dimensional composition explanatory diagram.

Figure 11 is the detailed description figure of the embodiment of Figure 10, and Figure 11 A are the explanatory diagram of driving ring, and Figure 11 B are elastic structure The explanatory diagram of part, Figure 11 C are the explanatory diagram of the cross sectional shape of elastic component.

Figure 12 A are the explanatory diagram of overlap condition when vane member to have been dwindled into little aperture state, and Figure 12 B are by blade Component is formed for the explanatory diagram of overlap condition during aperture Full-open state.

Figure 13 is the explanatory diagram of the composition of the camera head for representing the present invention.

Figure 14 is the explanatory diagram of prior art, and Figure 14 A are plane structure when vane member to have been dwindled into little aperture state Into explanatory diagram, Figure 14 B be its sectional view.

Figure 15 for prior art explanatory diagram, Figure 15 A are plane when making vane member become aperture Full-open state The explanatory diagram of composition, Figure 15 B are its sectional view, and Figure 15 C are to represent by the state of the open and-shut mode being formed slopely of vane member Figure.

Figure 16 is the embodiments different from Fig. 1（3rd embodiment）Three-dimensional composition explanatory diagram.

Figure 17 is the 1st substrate in the device of Figure 16（Seat board）With the structure explanatory diagram being exaggerated of blade group.

Figure 18 is the 2nd substrate in the device of Figure 16（Driving ring）The structure explanatory diagram being exaggerated.

Figure 19 A are the 1st substrate in the device for represent Figure 16（Seat board）Shape explanatory diagram, Figure 19 B for represent resin The explanatory diagram of the state of plate.

Figure 20 is the explanatory diagram of the vane member shape in the device of Figure 16, and Figure 20 A represent that the assembling of vane member is decomposed State, Figure 20 B represent the section constitution of vane member, and Figure 20 C are the explanatory diagram of the opening and closing track of vane member.

Figure 21 is the explanatory diagram of the effect of the embodiment of Figure 16, and Figure 22 A become aperture full-gear for vane member（Entirely Open bore）Overlap condition explanatory diagram, Figure 22 B for section state explanatory diagram.

Figure 22 is the explanatory diagram of the effect of the embodiment of Figure 16, and Figure 21 A become little aperture state for vane member（It is minimum Aperture bore）Overlap condition explanatory diagram, Figure 21 B for section state explanatory diagram.

Figure 23 is the explanatory diagram of the three-dimensional composition for representing different embodiment corresponding from Figure 17.

Figure 24 is the explanatory diagram of the effect of the embodiment of Figure 23, and Figure 24 A become aperture full-gear for vane member（Entirely Open bore）Overlap condition explanatory diagram, Figure 24 B for section state explanatory diagram.

Figure 25 is the explanatory diagram of the effect of the embodiment of Figure 23, and Figure 25 A become little aperture state for vane member（It is minimum Aperture bore）Overlap condition explanatory diagram, Figure 25 B for section state explanatory diagram.

Specific embodiment

Below according to the preferred embodiment explanation present invention of diagram.

Fig. 1 is the assembling exploded view being monolithically fabricated of the light amount adjusting device A for representing the present invention.Light amount adjusting device A is such as Shown in Fig. 1, by the 1st substrate in batch（Seat board group）1st, blade group 2, driving ring 31, the 2nd substrate in batch 4（Pressing plate group）Constitute.

Blade group 2 is installed in the 1st substrate in batch 1, the substrate in batch 4 of driving ring 31 and the 2nd is installed in this blade group 2.And, 1st substrate 11 is mutually combined with the 2nd substrate 41, is integrally formed by fixing components such as Screws, now, vane member 21 and drive Rotating ring 31 is supported between two substrates by sandwich-like.

According to such composition, optical axis opening 12 is formed on the 1st substrate 11 and the 2nd substrate 41, by multiple vane members 21a ~ 21i is adjusted to this optical axis opening 12 big small-bore.For this purpose, installing drive motor on the 1st substrate 11 or the 2nd substrate 41 M, makes driving ring 31 rotate predetermined angular by the rotation of motor M, multiple vane members 21 is moved by same amount every time by the rotation Move and size adjustment is carried out to the bore of optical axis opening 12.And, the central portion being formed in driving ring 31 is typically set It is set to the opening bigger than the optical axis opening 12 of seat board 11.

[composition of the 1st substrate in batch]

Fig. 2 is the decomposition explanatory diagram that the 1st substrate in batch 1 and blade group 2 in the assembling exploded view by Fig. 1 are exaggerated.1st base Plate group 1 is by the 1st substrate 11 and resin plate（Elastic component）15 are constituted.1st substrate 11（It is following to illustrate as seat board）And tree Fat plate 15 is formed as in ring-type of the central authorities with optical axis opening 12, and resin plate 15 is placed with layered laminate on seat board 11.And, this The material of plate 15 is not limited to resin, if having elasticity, then also can be made by thin metal etc..

Seat board is pressed in fig. 2（1st substrate）11st, the order of resin plate 15 is illustrated.

Optical axis opening 12 is formed in central part on seat board 11, its profile is configured to and camera head（It is not shown）'s The corresponding shape of lens barrel shape.This seat board 11 is formed as making light amount adjusting device A integrally have toughness by metal, synthetic resin etc. The material for being suitable as device pedestal, size.

In the periphery of above-mentioned optical axis opening 12, the supporting blades face 11x supported to vane member described later 21 is formed （Tabular surface or projection guide surface）.It is pin-shaped prominent the 1st to be arranged in a side of this supporting blades face 11x and each vane member 21 described later Play 22, the 1st slotted eye 13 engaged with it is set in the opposing party（It is following to illustrate as guide groove）.

This pin-shaped projection 22 and guide groove 13 are mutually chimeric, make vane member 21 be opened and closed shifting by the track of regulation along slotted eye It is dynamic.The 2nd pin-shaped projection 23 is formed on a side of each vane member 21 and driving ring described later 31, the 2nd is formed on the opposing party Slotted eye 33.

In Fig. 2 shown devices（One embodiment）In, in the side one faced with seat board 11 of vane member described later 21 Body ground forms the 1st pin-shaped projection 22, and the 2nd pin-shaped projection 23 is integrally formed in the side faced with driving ring 31.In addition, present The 1st slotted eye is formed on plate 11（Guide groove）13, the 2nd slotted eye 33 is formed in driving ring 31, the former is chimeric with the 1st pin-shaped projection 22, The latter is chimeric with the 2nd pin-shaped projection 23.In addition, the 1st slotted eye 13 is by the slit groove along the opening and closing track of vane member 21（Hereinafter referred to as For " guide groove "）Formed.1st slotted eye 13 is not the slotted eye of insertion so that the light from the side of seat board 11 does not pass through the 1st slotted eye 13 And cause unwanted light to enter in light path.

" composition of seat board "

The mold formed formation that seat board 11 shown in Fig. 2 passes through synthetic resin.In this occasion, there is toughness to make seat board Occasion, is mixed into glass fibre, in the occasion that make it have charging property, is mixed into carbon fiber etc..By so by synthetic resin into Shape, even if for complicated shape, processing also easily, can be manufactured inexpensively.

Further, it is possible to lighter using being configured as the seat board of device substrate.As synthetic resin, used according to purposes heat-resisting The good carbon fiber of the good glass fiber reinforced plastics of the good epoxy resin of property, toughness, electric conductivity is mixed into resin etc..

So, from slimming, small, light grade, best seat board 11 is made by the mold formed of synthetic resin Make.In addition, from durability, electric conductivity etc., reinforcing fiber, conducting fibre etc. are mixed in resin, obtain desired Characteristic.

Conversely, by forming synthetic resin substrate（Seat board）Occasion, there is a problem of that machining accuracy is deteriorated or is mixed into fibre Dimension makes surface roughness be deteriorated, the problem of frictional resistance increase.It is a feature of the present invention that by " making elasticity as described below Component is between seat board and vane member ", solve these problems.

" the composition of elastic component（1st embodiment）”

The present invention the 1st embodiment be characterised by, blade structure described later is not directly loaded and supported on seat board 11 Part 21, but make resin plate 15（Elastic component）Place is constituted below between this seat board 11 and vane member 21 to it It is bright.

Resin plate 15 is formed as and seat as represented its stereochemical structure in fig. 2, representing planar structure in figure 4b The ring-type of the roughly the same shape of plate 11.This ring-type is the shape that can equably push relative to each vane member 21, Er Qierong Easy processing, so, it is optimal shape, but also can not be this ring-type, but for can be relative to each vane member 21 equably The non-annularity of pushing.

This resin plate 15 is in the supporting blades face 11x and leaf of seat board 11 as represented cross section structure in figure 7b Between sheet element 21, it is to avoid vane member 21 is directly contacted with seat board 11.The resin plate 15 of diagram is formed as with seat board 11 substantially Identical flat shape.

This resin plate 15 is formed by the resin film little with the coefficient of friction of vane member described later 21.The resin plate of diagram 15 by with the identical raw material such as polyvinyl resin thin film of vane member described later 21（PET sheet）Model Blanking Shaping shape Into.

In addition, as representing its shape in figure 4b, forming the guide groove 16 consistent with the guide groove 13 of seat board 11.This guide groove 16 are explained below.

Therefore, by the mold formed formation seat board 11 of resin, tree is formed by the model Blanking Shaping of resin film The occasion of fat plate 15, compared with the form accuracy of seat board 11, can in high-precision form the form accuracy of resin plate 15.This be because For, to compare the resin that will have been melted and pour into the mold formed of finishing die and compare, the raw material to being formed as lamellar by roll enters Row model Blanking Shaping, is obtained in that higher dimensional accuracy.

In addition, the material for making resin plate 15 is and the identical material of vane member 21, so that thermal change equitemperature characteristic Actually identical with vane member, vane member 21 is same raw materials with resin plate 15, and band electric array is identical, so, even if Both slide, also will not static electrification.

The resin plate 15 of diagram is formed and the same shape of seat board 11, the base end part of more blades component 21 21x is supported in the periphery of centrally located optical axis opening 12, and leading section 21y is propped up in the way of optical axis open interior is aimed at Hold.

[relation of guide groove and pilot pin]

Below explanation be formed on above-mentioned seat board 11 guide groove 13, be formed on resin plate 15 guide groove 16, with And the guiding pin being formed on each vane member 21（1st pin-shaped projection）22 relation.

It is blind that the guide groove 13 of seat board 11 is formed as shown in Figure 7 B that light be made up of groove, outside seat board is not through Hole shape.In addition, according to the relation by mold formed formation seat board 11, forming demoulding taper theta, the average-size quilt of its groove width It is set as dg.

In addition, the guide groove 16 of resin plate 15 by it is narrower than groove width dg of seat board 11, guiding pin 22 will not block in slit The through hole of mobile groove width db freely or so is formed in groove.This through hole is formed by the model Blanking Shaping of resin film For uniform diameter.

On the other hand, the implanting guiding pin 22 on each vane member 21a ~ 21i, its external diameter is set to da.Therefore, this draws The relation quilt of groove width db of the guide groove 16 of pin outside diameter d a of pilot pin 22, groove width dg of the guide groove 13 of seat board 11 and resin plate 15 It is set as da≤db<The relation of dg.

That is, the guide groove 16 of resin plate 15 presses the width narrower than the guide groove 13 of seat board 11（db<dg）It is set as outer with guiding pin Footpath da suitable size（da≦db）.

Therefore, as shown in the drawing, the guiding pin 22 for having planted on each vane member 21a ~ 21i（1st projection）Cardinal extremity Portion engages with the guide groove 16 of resin plate 15, and motion is restricted, and guides pin 22（1st projection）Leading section by not with seat board 11 The mode of the contact of guide groove 13 is constituted.

For this purpose, guiding pin（1st projection）22 will not astatically engage with the guide groove 13 of the seat board 11 with taper theta, respectively Vane member 21a ~ 21i sleekly actions.

Therefore, the 1st substrate in batch 1 being made up of seat board 11, resin plate 15 forms clearance G a between driving ring 31（Reference Fig. 8 B）, vane member 21 is movably supported.

It is a feature of the present invention that resin plate 15 is with for the elasticity of each vane member 21 of the side of driving ring 31 pushing Power.For this purpose, resin plate 15 is made up of the plastic sheeting with elastic force, it is illustrated that resin plate 15 by described polyvinyl resin Thin film is formed.

In addition, as shown in Fig. 2 and Fig. 8 B, stage portion 11z for bending resin plate 15 is formed on seat board 11.The field of diagram Conjunction forms projection on the supporting blades face 11x of seat board 11, forms stage portion 11z.And, stage portion 11z is corresponding to aftermentioned The composition piece number of vane member 21 configure same quantity, or be arranged to as illustrated than blade piece number（9 compositions） It is few（3 positions）, or the movement locus configuration for pressing blade.In addition, stage portion 11z is not limited by diagram shape, alternatively chevron Shape, or stage portion 11z is not formed as the embodiment, but the bending forming of resin plate 15 is made in advance, as long as a result making generation The resin plate 15 of elastic deformation has the elastic force pushed to vane member 21.And, when resin plate 15 is filled When entering in the 1st substrate in batch 1, one end of best fixing resin plate 15（Outboard end）, lifted by stage portion 11z and make resin plate 15 Bending, so as to apply elastic force.

" vane member "

One of blade shape is represented in Figure 5, and base end part 21x is bearing in seat board 11 via above-mentioned resin plate 15 On.In addition, the leading section 21y of vane member is opened and closed to optical axis opening 12.Now, the leading section 21y of multiple vane members It is mutually overlapped in squamous, become the shape for being formed iris in circular light path bore 12 by leading section 21y.

And, as described above, each vane member 21 engaged by pin-shaped projection with a side of seat board 11 and driving ring 31, Engaged with the opposing party by axis hole, each vane member 21 is made along slotted eye by the rotation of driving ring 31（Guide groove 13,16）Opened Close movement.For example pass through polyvinyl resin thin film（PET sheet）Model Blanking Shaping being formed.

On each vane member 21a ~ 21i of diagram, as shown in Figure 5 B, implanting the 1st is pin-shaped on the table back side of accessory 24 Projection（Guiding pin）22 and the 2nd pin-shaped projection（Action pin）23.This guiding pin 22 is configured in and seat board 11 on each vane member The position of side pair, action pin 23 is configured in its opposing face（2nd substrate-side described later）On.Diagram reference 24z is welding Face, reference 21z represents fusing face.

Then, pin 22 is guided to be entrenched in as described later in the guide groove 16 of the guide groove 13 of seat board 11 and resin plate 15, action Pin 23 is entrenched in the 2nd slotted eye 33 of driving ring described later 31.

[composition of the 2nd substrate in batch]

Below, the 2nd substrate in batch 4 is illustrated according to Fig. 3.2nd substrate in batch 4 is by pressing plate 41, reinforcing plate 42, Yi Jigu Driving means M on being scheduled on driving ring 31 and pressing plate 41 are constituted.Each composition is illustrated below.

" pressing plate "

Pressing plate 41 is formed as big with described seat board 11 as shown in figure 3, be formed as the ring-type for having opening 43 in central part Cause identical shape.The mold formed peace that driving means M are set in a part for periphery that the pressing plate 41 of diagram passes through resin Dress seat 46.With the fixation such as Screw driving means M described later in this mounting seat 46.Diagram reference 45 is will with Screw Pressing plate 41 is fixed on the connecting hole in the connection projection 14 of seat board 11.

" reinforcing plate "

Reinforcing plate 42 as shown in figure 3, be made up of the firm sheet material of the comparison of metal etc., resinous pressing plate 41 is carried out plus By force.Therefore, when pressing plate 41 is obtained in that enough intensity, reinforcing plate 42 can be omitted.This reinforcing plate 42 is formed as and pressing plate 41 Same shape, in central authorities opening 44 is formed.

The opening 43 of above-mentioned pressing plate 41 and the opening 44 of reinforcing plate 42 are all set to the opening diameter D than optical axis opening 12 Greatly, the opening diameter D of the opening diameter D1 of opening 43, the opening diameter D2 of opening 44 and optical axis opening 12 is configured to D2 ≧D1>D。

" driving ring "

As shown in Figure 3, mold formed for example, by resin is formed as in central part there is optical axis to open to driving ring 31 The ring-type of mouth 12（Hereinafter referred to as " driving ring "）.The driving ring 31 is rotatably arranged on pressing plate 41 via reinforcing plate 42.

For this purpose, in driving ring 31, in the periphery of optical axis opening 12 flange 32 and engaging protrusion 34 are formed.Flange 32 and pressure The opening 43 of plate 41 and the opening 44 of reinforcing plate 42 are chimeric, rotate by the center of rotation consistent with the center of optical axis opening 12.Separately Outward, engaging protrusion 34 is formed on the face with the sliding contact of reinforcing plate 42, and both auxiliary are sleekly slided.

Driving ring 31 is rotatably mounted on above-mentioned such pressing plate 41, and in a part for its periphery driven tooth 35 is formed. This driven tooth 35 is located at what is engaged with the drive gear 53 of driving means M described later being arranged in the mounting seat 46 of pressing plate 41 Position.

In above-mentioned driving ring 31, with action pin of the implanting on each vane member 21a ~ 21i（2nd pin-shaped projection）23 The 2nd chimeric slotted eye 33 is located on the periphery of optical axis opening 12.2nd slotted eye 33 corresponds to the piece number of vane member 21 in light Configure multiple on the periphery of axle opening 12（It is 9 positions in the occasion of diagram）.

In such composition, driving ring 31 is rotatably bearing on pressing plate 41, by the drive gear of driving means M 53 rotation predetermined angulars.Then, the rotation of driving ring 31 is passed to each vane member 21a ~ 21i.

[compositions of driving means]

An embodiment of driving means M is represented in fig .9.Driving means M of the figure are by by multipole（Such as 8 poles）Magnetic It is the Magnmet rotor 50 changed, multiple（Such as 12）Stator coil 51 and driving rotary shaft 52, drive gear 53, yoke 54 are constituted So-called impulse motor.Magnmet rotor 50 is constituted by the way that rotary shaft 52 will be driven integrated with permanet magnet 56, clips drive The stator line that dynamic rotary shaft 52 is arranged on convolute coil 58 on unshakable in one's determination 55 by equal intervals around Magnmet rotor 50 and is constituted Circle 51.Permanet magnet 56 presses multipole magnetized formation NS poles in periphery, install in rotary shaft 52 drive gear 53 driving.

Driving means M for so constituting are in the mounting seat 46 of pressing plate 41 with the mounting brackets such as screw 57.Then, will drive Moving gear 53 is engaged with the driven tooth 35 of driving ring 31.So, clockwise direction and counter-clockwise direction weight of the driving ring 31 in Fig. 3 Predetermined angular is moved again, and movement is opened and closed to aperture blades 21.

[explanation of assembled state]

The device of Fig. 1 is represented in the 1st substrate in batch 1 by blade group 2, the order group of the substrate in batch 4 of driving ring 31 and then the 2nd The occasion of dress.As shown in figure 1, driving means M are fixed on pressing plate 41 with Screw etc..Then, seat board 11 is placed on into work On industry platform, resin plate 15 is installed on seat board.Next, overlapping each vane member 21a ~ 21i in the 1st substrate in batch 1.

Now, by the guiding pin of each vane member 21（1st pin-shaped projection）22 are accommodated in the guide groove 13 of seat board 11.This When, overlap each vane member by the order of the 1st blade 21a, the 2nd blade 21b, the 3rd blade 21c in the periphery of optical axis opening 12 Abutting end and be in squamous arrange regulation piece number vane member 21.Then, when n-th for finally overlapping（9th blade）Blade structure When part 21i is overlapped on the (n-1)th vane member, the leading section 21y of vane member is inserted the base end part 21x's of the 1st blade 21a Lower section.

Which vane member 21 by the so vane member 21a of assembling blade group the 2, the 1st ~ the n-th ~ 21i is all circumference side To a side of two ora terminalis overlap the upside of adjacent vane member, the opposing party overlaps the downside of adjacent vane member, It is overlapped into so-called squamous.

Then, driving ring 31 is installed in blade group 2.Now, the action pin 23 of each vane member is made（2nd pin-shaped projection） It is chimeric with the slotted eye 33 of driving ring 31.Then, the 2nd substrate in batch 4 is installed in the way of it can rotate centered on optical axis opening 12. Now, the engaging of driving ring 31 is dashed forward in the way of the drive gear 53 of driving means M is engaged with the driven tooth 35 of driving ring 31 In playing the opening 43 of 34 insertion pressing plates 41, driving ring 31 is rotatably installed on pressing plate 41.

Therefore, with the fixing component such as Screw fixed base plate 11 and pressing plate 41.So, as the 1st substrate（Seat board）11st, leaf Piece group 2（Vane member 21）, the substrate of driving ring 31 and the 2nd（Pressing plate）The component of 41 integrations, constitutes light amount adjusting device A。

By the overlapping of such vane member, such as set optical axis opening as maximum caliber, then it is as shown in figure 7 a, such as each Vane member is rotated to the outside of the optical axis opening 12 of seat board and is reduced into lowest calibre, then be like that in as shown in Figure 8 A squamous weight The leading section 21y of each vane member folded mutually is supported, even if not supported also relative to optical axis opening 12 by seat board Plane keeps the posture of general parallel orientation.Now, the leading section 21y of each vane member 21a ~ 21i is from other leading sections to seat board 11 side warpages, generally each vane member 21a ~ 21i are present from base end part 21x forward ends 21y up warpage, its base end part 21x The interval of plate 11 and driving ring 31（L）Between when inclining, push base end part from the elastic force of resin plate 15 to the side of driving ring 31 21x, so that base end part 21x is at seat board 11 and the interval of driving ring 31（L）Between remain general parallel orientation state.

[other explanations of assembled state]

The other methods beyond the assemble method that is explained above are illustrated below.In above-mentioned assemble method In, assembled using special operation post, and in this assemble method, it is not necessary to for the special operation post of assembling, according to Make the device of Fig. 1 up and down in turn in the state of the method that assembled, press driving ring 31, blade group in the 2nd substrate in batch 4 The order of the 2 and then the 1st substrate in batch 1 is assembled.Illustrate underneath with Fig. 1, first, with Screw etc. by driving means M It is fixed on pressing plate 41, and the engaging protrusion 34 of driving ring 31 is embedded in the opening 43 of pressing plate 41, by the drive of driving means M The mode that moving gear 53 is engaged with the driven tooth 35 of driving ring 31 is inserted the opening of pressing plate 41 by the engaging protrusion 34 of driving ring 31 In 43, driving ring 31 is rotatably arranged on pressing plate 41.Then, the body of the 2nd substrate in batch 4 is placed on operation post, The blade group 2 being made up of each vane member 21a ~ 21i is overlapped in driving ring 31.

Now, in the periphery of optical axis opening 12, while by the action pin 23 of each vane member（2nd pin-shaped projection）It is entrenched in In the slotted eye 33 of driving ring 31, while lay vane member 21a, be then below vane member 21a upside overlap Vane member 21b, continues up overlapped blades component 21c ~ 21i successively, by last vane member 21i's and vane member 21a adjacent position insertion vane member 21a lower sections, so as to be arranged in squamous, the 1st ~ the n-th vane member 21a ~ 21i Which vane member 21 be all that the side of two ora terminalis of circumferencial direction overlaps the upside of adjacent vane member, the opposing party The downside of adjacent vane member is overlapped, with so-called squamous overlap.

Then, press the guiding pin of each vane member 21 from the top of blade group 2（1st pin-shaped projection）22 are accommodated in seat board Mode in 11 guide groove 13 installs resin plate 15, is similarly covered with seat board 11 from it, assembles the 1st substrate in batch 1.

Then, with the fixing component such as Screw fixed base plate 11 and pressing plate 41.So, also can be used as the 1st substrate（Seat board） 11st, blade group 2（Vane member 21）, driving ring 31, the 2nd substrate（Pressing plate）The component composition light amount adjusting device of 41 integrations A。

[on-off action of vane member]

Below, the on-off action of vane member is illustrated according to Fig. 5 and Fig. 6.Fig. 6 A are represented in optical axis opening 12 Surrounding is configured with the aperture Full-open state of multiple vane members 21, and Fig. 6 B represent the opening and closing of 1 of this multiple vane member 21 Operating state.

As Fig. 6 A, around optical axis opening 12, in the position for having separated predetermined angular on the basis of light Lu Zhizheng O （It is to make 9 positions that respectively angularly θ=40 degree have separated of vane member 21 in the occasion of diagram）, the quilt of multiple vane members 21 It is configured to squamous.

The guiding pin of each vane member 21（1st pin-shaped projection）22 with the guide groove 13 being formed on seat board 11（1st groove Hole）It is chimeric.And it has been formed in the action pin 23 on each vane member 21（2nd pin-shaped projection）With the slotted eye of driving ring 31（It is embedding Close hole）33 are fitted together to.

As shown in Figure 6B, driving ring 31 centered on light Lu Zhizheng O by described driving means M in predetermined angular scope Inside toward the clockwise direction with counter-clockwise direction rotate.Now, as shown in Figure 5 C, by the rotation of driving ring 31, make action pin 23 by The arc track x-x for leaving radius L from diagram light Lu Zhizheng O is in rotary moving to d points from diagram c points clockwise towards the figure. In addition, guiding pin（1st projection）22 are moved by diagram y-y tracks along guide groove 16 from a points to b points.

Thus action pin（2nd projection）23 sell with guiding（1st projection）22 movement, makes vane member 21 from using solid line table The aperture Full-open state shown to the little aperture state represented with dashed line is opened and closed movement.Therefore, corresponding to driving dress The electric current of M supplies is put, vane member 21 is straight to arbitrary opening is opened and closed into aperture Full-open state from little aperture state Footpath, to the light quantity by optical axis opening 12 size adjustment is carried out.

[explanation of effect]

Illustrate below according to effects of the Fig. 7 and Fig. 8 to Fig. 1 shown devices.

Light amount adjusting device A is consisted of by the order of seat board 11, resin plate 15, vane member 21, driving ring 31, pressing plate 41 Layered laminate, seat board（1st substrate）11 and pressing plate（2nd substrate）41 are fixed by the fixing component of Screw etc..

In this case, clearance G a between resin plate 15 and driving ring 31 is by the connection projection 14 being located on seat board 11 （May also be arranged on the 2nd substrate）Height setting（Reference picture 7B）.The thickness of resin plate 15 is such as set as t1, the thickness of driving ring 31 Spend for t2, the thickness of vane member is t3, the Maximum overlap piece number of vane member is m, the mutual action clearance of vane member For dc, then the height of this connection projection（H）Pressed [H=t1+t2+t3m+dcm] setting.

According to such condition, vane member 21 is such as set to enter to the little aperture state of Fig. 8 A from the aperture full-gear of Fig. 7 A Row is moved openingly and closingly, between resin plate 15 and driving ring 31, under aperture full-gear as shown in figure 7 a, and each vane member 21a ~ 21i up overlaps respectively 3, as shown in Figure 8 A like that under little aperture state, each vane member 21a ~ 21i respectively into It is to insert the state of 3 in lower section.

For example shown in Fig. 7 A, when blade is full-gear, the overlapped blades structure on the leading section 21y of vane member 21a The base end part of part 21b, thereon the base end part of overlapped blades component 21c, has overlapped 2.In addition, as shown in Figure 8 A, blade is worked as When component is little aperture state, it is such 1 to accompany vane member 21b below the base end part 21x of vane member 21a, and The leading section of vane member 21b is inserted in the lower section of the leading section 21y of vane member 21a, inserts vane member 21c's thereunder Leading section, then the leading section of vane member 21d is inserted thereunder.Therefore, near the periphery of the optical axis opening 12 of seat board 11 Vane member 21 becomes the minimum state for having overlapped 3 or so.

Therefore, clearance G a between resin plate 15 and driving ring 31 becomes the thickness of vane member（t3）With superimposed sheets number （n）Product and the mutual action clearance of vane member（dc）With superimposed sheets number（n）Product summation [Ga=t3n+dcn].

Therefore, although gap Ga is little relatively good when the superimposed sheets number of vane member is few, resin plate 15 and driving ring 31 Gap also press Maximum overlap piece number setting.

As a result, as shown in figure 15, under the full-gear of vane member or the open state of close full-gear, The superimposed sheets number form of vane member is compared into big gap, for this purpose, vane member 103a is easily inclined.This state representation is in figure In 15B.In contrast, as shown in Figure 7 B, the resin plate 15 between vane member 21 and seat board 11 is as illustrated to drive The side of rotating ring 31 pushes vane member, for this purpose, the inclination of vane member 21a is suppressed.

In addition, under the little aperture state of vane member shown in Fig. 8 A or the aperture openings state Jie Jin little aperture state, The leading section 21y of vane member 21 is by overlap with the leading section 21y of other vane members 21 and produce warpage, although should The warpage of leading section 21y inclines will base end part 21x, but resin plate 15 pushes blade structure to the side of driving ring 31 as illustrated Part, for this purpose, the inclination of vane member 21 is suppressed, will not incline.

And, although illustrate in order to resin plate 15 apply elastic force and on the supporting blades face 11x of seat board 11 shape Into the occasion of stage portion 11z, but flexure strip is cut by arranging on resin plate 15, the step of bearing-surface can be saved.

[the 2nd embodiment of elastic component]

The elastic component being explained above illustrates the side by the vane member that the change of superimposed sheets number is pushed to driving ring side Formula is configured between seat board and vane member, and by stage portion 11z being arranged on seat board the occasion of elastic force is applied.Also can adopt Replace this mode with following embodiment.Constitute with Fig. 2, Fig. 3 illustrated embodiment identical and adopt identical reference, Omit the description.

As shown in Figure 10, it is assembled into layered laminate by the order of seat board 11, vane member 21, driving ring 31, pressing plate 41.This When, resin plate 36 is configured between vane member 21 and driving ring 31.This resin plate 36 is for example constituted in the following fashion.

[composition of elastic component]

Resin plate 36 is as shown in Figure 11 B like that by resin film of the central authorities with optical axis opening 12（Such as polyethylene etc. Resin film）Formed, be between driving ring 31 and vane member 21.

This is the round and smooth opening and closing fortune that vane member is obtained in order to avoid vane member 21 and the directly contact of driving ring 31 It is dynamic, meanwhile, arrange on resin plate 36 and cut flexure strip 36x, push leaf to the side of seat board 11 for facing from the effect of the flexure strip Sheet element 21.

In addition, it is illustrated that resin plate 36 by constituting with the identical raw material of vane member 21.By the leaf for making mutual slip Sheet element and slip ring are phase same material, and the temperature characterisitic of thermal change etc. actually becomes identical with vane member, due to blade Component is same raw materials with slip ring, and band electric array is identical, so, even if both slide, also will not static electrification.

Above-mentioned resin plate 36 is formed as the ring-type same with driving ring 31.On this resin plate 36, with driving ring 31 The consistent position of embedded hole 33 arranges connecting hole 37.

The embedded hole 33 of the driving ring 31 sets as the following formula with the connecting hole 37 of resin plate 36 and has been formed on each leaf The 2nd projection on sheet element（Action pin）23 outside diameter d e, the diameter dd of the embedded hole 33 of driving ring 31, the engaging of resin plate 36 The relation of the diameter df in hole 37.

de≦dd<df（Formula 1）

That is, by the action pin of vane member（2nd projection）The diameter dd of 23 outside diameter d e and the embedded hole 33 of driving ring 31 Coadapted mode is fitted together to, and the diameter df of the connecting hole 37 of resin plate 36 is set and compares action pin（2nd projection）Outside 23 Footpath de is sufficiently large.

So, the action pin of vane member（2nd projection）23 is actually chimeric with the embedded hole 33 of driving ring 31, with resin The connecting hole 37 of plate 36 does not engage.

So by the embedded hole 33 of driving ring 31（Diameter dd）It is set as the connecting hole 37 than resin plate 36（Diameter df）It is little Diameter the reasons why it is as follows.Resin plate 36 is between driving ring 31 and vane member 21.For this purpose, by the opening and closing of vane member 21 Motion or the rotational motion of driving ring 31 make the also rotary motion of resin plate 36.

In addition, at appropriate position on resin plate 36（3 positions at for example, 120 degree intervals）Formation cuts flexure strip 36x.Flexure strip 36x is made up of warpage piece, the warpage piece from elastic component contact with vane member in the face of opposition side Driving ring is contiguously bent.

Therefore, the flexure strip 36x that cuts of resin plate 36 is abutted with driving ring 31, and to seat board side vane member 21 is pushed.Its Act on identical with the effect illustrated according to Fig. 7 and Fig. 8.

[camera head]

Below according to Figure 13 to being illustrated using the camera head of above-mentioned light amount adjusting device A.

Load described light amount adjusting device in the lens barrel of photographing unit, video camera etc..Diagram reference B be with The frontal lens in pinch shadow light path are put, C is rear lenses, will be imaged to taking the photograph body image by these lens, on its imaging surface It is configured like cell S.As image-generating unit S, using CCD etc. to solid-state imaging element or photographic film etc..

In addition, control is constituted in the way of being implemented by cpu control circuit, exposure control circuit.Reference SW1 of diagram For main power switch, SW2 is shutter release switch.In the control as camera apparatus, additionally using using automatically right Burnt circuit etc., but due to for known composition, so, omit the description.

Therefore, iris apparatus E and shutter dress are installed between the frontal lens B and rear lenses C being put in lens barrel Put（It is not shown）.Vane member 21 and driving means M described in loading in this iris apparatus E.

Therefore, pinch shadow stripe parts such as CPU setting light exposures, shutter speed are controlled, to exposure control circuit indication signal is sent. Firstly, for light exposure, advised to the coil supply of driving means M by the indication signal from control CPU from exposure control circuit Determine the electric current in direction.So, the rotation of driving means M is transmitted from action pin 23 to vane member 21 via drive gear 53, will Optical axis opening 12 dwindles into optimum exposure.

Then, such as operation release button, then the occasion in solid-state imaging elements such as CCD releases the electric charge for having charged, opens Begin a pinch shadow.Therefore, fast gate drive circuit receives shutter action and opens after the time of exposure preset from control CPU The signal of beginning, to the coil of driving means the electric current of shutter closing direction is supplied.After this shutter action, it is in image-generating unit S CCD（Solid-state imaging element）Occasion, to image processing circuit transmit view data, in being stored in memorizer etc..

The the 3 of elastic component [, the 4th embodiment]

In the 1st for being explained above, in the 2nd embodiment, illustrate resin plate 15 as elastic component, step is set Portion 11z cuts flexure strip 36x and applies elastic force to resin plate 15, and to the side of driving ring 31 or the side of seat board 11 vane member is pushed 21 occasion.Following embodiment may also be employed and substitutes this mode.Constitute with the above-mentioned 1st, the 2nd embodiment identical and mark Identical reference, omits the description.

Figure 16 ~ Figure 22 is the figure of the light amount adjusting device A for representing the elastic component for being provided with the 3rd embodiment.It is real the 3rd In applying mode, on vane member 21 elastic component is provided with.Vane member 21 is formed by model Blanking Shaping, but in its mould During type Blanking Shaping, in base end part 21x pinch off blade is formed（Elastic component）21r（Reference picture 20A, B）, the pinch off blade（Elastic structure Part）21r is formed as step-like by the way that a part of its base end part 21x is cut.

Because each vane member 21 is by such as polyvinyl resin thin film（PET sheet）Constitute, so, this pinch off blade 21r has Elastic force.

In addition, as shown in Figure 21 B, pinch off blade 21r is abutted with the plane of driving ring 31, elastic deformation is produced, its Counter-force exerts a force to the side of seat board 11 across resin plate 15 as elastic force to base end part 21x.

In the presence of the elastic force that here applies, the base end part 21x of each vane member 21 is maintained and seat board 11（Resin plate 15）The parallel posture state of plane 11x, will not incline, so, do not cause above-mentioned light quantity inhomogeneities.

And, pinch off blade 21r is the shape for being easiest to implement in processing, and elastic component alternatively obtains elastic force for example In the raised face that the base end part of blade substrate is defined by difference of height（For example, the jut that the notch of pinch off blade 21r is connected to Upper plane）.

In addition, pinch off blade 21r is configured in the 1st pin-shaped projection（Guiding pin）22 and the 2nd pin-shaped projection（Action pin）Between 23, So as to equably in each fulcrum applying elastic force, the inclination inhibition increase of each vane member.

And, this pinch off blade 21r also can by each vane member 21 outside other component constitute, by bonding or welding will The component is arranged on the base end part 21x of each vane member 21.

Figure 23 ~ Figure 25 is the figure of the light amount adjusting device A for representing the elastic component for being provided with the 3rd embodiment.Here reality In applying mode, it is possible to use spring member 21t（Elastic component）To replace above-mentioned pinch off blade 21r, spring member 21t is around each leaf 2nd pin-shaped projection of sheet element 21（Action pin）23 windings, are configured between driving ring 31, the driving ring 31 by compressive state Engage with the 2nd pin-shaped projection 23, so, under the resilient force of spring member 21t, the base end part of each vane member 21 21x is maintained and seat board 11（Resin plate 15）The parallel posture state of plane 11x（The elastic component of the 4th embodiment）.

Even if in addition, this spring member 21t is configured in the 1st pin-shaped projection（Guiding pin）22 sides, it is also possible to obtain same Effect.

In addition, arranging the elasticity such as pinch off blade 21r and spring member 21t by the other component outside each vane member 21 Component, can independently set appropriate elastic force with the material of vane member, and each vane member is obtained under suitable condition Inclination inhibition, it can be ensured that round and smooth action.

And, using spring member 21t, can also be by using the 2nd pin-shaped projection（Action pin）23 or the 1st pin-shaped projection 22 Fulcrum and hinder the dangerous elimination for moving openingly and closingly of adjacent vane member.

Figure 21 and Figure 22 are the figure of the operating state for representing the composition for being provided with pinch off blade 21r.And, pair with Fig. 7, Fig. 8 Illustrated embodiment identical constitutes mark identical reference, omits the description.Figure 21 represents the device in open state State, Figure 22 represents the state of the device in little aperture state, as illustrated in fig. 21b, has been formed in the base of vane member 21a The step surface of the pinch off blade 21r of end 21x is crimped with the plane of driving ring 31, is resiliently deformed.

Deformed the retroaction for producing by pinch off blade 21r, the base end part 21x of vane member 21a is by across resin plate In 15 planes 11x for pressing against seat board 11, as a result, the inclination of vane member 21a is inhibited.

In addition, under the little aperture state of vane member shown in Figure 22 A or the aperture openings state Jie Jin little aperture state, The leading section 21y of vane member 21 is due to and warpage, the leading section overlap with the leading section 21y of other vane members 21 The warpage of 21y tends to inclining base end part 21x, but the pinch off blade 21r being formed on the base end part 21x of vane member 21a Step surface is crimped with the plane of driving ring 31, produces elastic deformation, and by by the pinch off blade 21r retroaction for producing is deformed, The base end part 21x of vane member 21a makes vane member 21a in plane 11x that elastic component 15 presses against seat board 11, thus Inclination be inhibited.

Figure 23 ~ Figure 25 represents each action pin in the side of driving ring 31 for being configured in each vane member 21（2nd projection）On 23 The composition of configuration spring member 21t.Spring member 21t as shown in Figure 24 B, Figure 25 B with engaged by the action pin 23 Install by compressed state between driving ring 31, always push away the base end part 21x of vane member 21a across resin plate 15 It is pressed in plane 11x of seat board 11, the inclination to vane member 21a suppresses.

Below, the effect of the light amount adjusting device illustrated by the 3rd, the 4th embodiment is recorded.It is many for overlapped Piece vane member（21）, in the substrate supported to it in the way of it can be opened and closed（11）With driving ring（31）Between formed ratio The big gap of the overlapped thickness of vane member, in the gap of this substrate and driving ring, even if each vane member is for instance in little Aperture state, each vane member is from base end part（21x）Towards leading section（21y）It is upturned and incline each vane member, separately Outward, even at aperture Full-open state, the postural change of camera head and incline each vane member, by by elastic structure Part（21r or 21t）Inclination to each vane member suppresses so that the base end part of each vane member of opening and closing will not be produced Big inclination.Therefore, will not be because of a pair of fulcrums of each vane member（22、23）Be formed in substrate and driving ring on pin Shape projection and slotted eye（33）Clamped position incline cause position to offset, thus it is possible to the aperture that will be formed by each vane member Bore is set as appropriate value, carries out appropriate light quantity adjustment.

In addition, more blades component is by the blade substrate structure that can carry out elastic deformation for forming base end part and blade part Into, Flexible element is made up of the base end part in the blade substrate by the raised face with elastic force that difference of height is defined, so as to The quantity of device component parts will not be increased, nor increase any erector's ordinal number, be pacified by common installation procedure Fill each vane member, it becomes possible to the base from each vane member elastic force of itself to substrate-side or driving ring side to each vane member End exerts a force.

In addition, more blades component is made up of the blade substrate for being capable of elastic deformation for forming base end part and blade part, bullet Property unit is formed for step-like pinch off blade by a part for the base end part of the blade substrate is cut（21r）Constitute, this Sample, does not increase the quantity of device component parts, nor increases any installation procedure quantity, is only by common installation procedure Each vane member is installed, it becomes possible to from each vane member elastic force of itself to substrate-side or driving ring side to each vane member Base end part force.

In addition, more blades component is made up of blade substrate and assisting base plate；The blade substrate forms base end part and blade Portion, being capable of elastic deformation；The assisting base plate possesses the composition surface engaged with the base end part, is formed by from the composition surface insertion cardinal extremity A pair of fulcrums that 1st fulcrum in portion is constituted with the 2nd fulcrum erected in composition surface opposition side；Flexible element is by by the assisting base plate A part for the base end part of each vane member for facing cuts and is formed as step-like pinch off blade in opposition side and constitutes；So, Do not increase the quantity of device component parts, nor increase any installation procedure quantity, be only by common installation procedure Each vane member is installed, it becomes possible to from each vane member elastic force of itself to substrate-side or driving ring side to each vane member Base end part exerts a force.

In addition, the base end part in each vane member has by bonding or Weld-supporting or integrally formed and constitute a pair Fulcrum, Flexible element is formed as step-like by cutting a part for the base end part of each vane member between a pair of fulcrums Pinch off blade constitute, so, do not increase the quantity of device component parts, nor increase any installation procedure quantity, only It is that each vane member is installed by common installation procedure, it becomes possible to from each vane member elastic force of itself to substrate-side or driving Ring side exerts a force to the base end part of each vane member.In addition, by configuring Flexible element between a pair of fulcrums, will be by Flexible element The elastic force of generation is evenly applied on each fulcrum, the inclination inhibition increase of each vane member.

In addition, Flexible element by a pair of fulcrums wound on each vane member either one, be configured in by compressive state The substrate of the fulcrum engaging or the spring member between driving ring and base end part are constituted such that it is able to the fulcrum of each vane member Centered on each vane member is exerted a force to substrate-side or driving ring side.In addition, using spring member, energy by being used as Flexible element The material of enough and vane member independently sets appropriate elastic force, and the inclination suppression of each vane member is obtained under suitable condition Effect processed, it can be ensured that round and smooth action.And, what is hindered is produced to the moving openingly and closingly for vane member for adjoining using fulcrum Danger is also eliminated.

The application request basis proposed Japanese patent application numbering 2011-104964 of application on May 10th, 2011 Number and propose on July 13rd, 2011 application Japanese patent application numbering 2011-154631 priority.

[explanation of reference]

A light amount adjusting devices

M drive motors

The supported clearance of L vane members

1 the 1st substrate in batch（Seat board group）

2 blade groups

4 the 2nd substrate in batch（Pressing plate group）

11 the 1st substrates（Seat board）

11x supporting blades face

11z stage portions

12 optical axis openings

13 the 1st slotted eyes（Guide groove）

15 resin plates（The elastic component of the 1st embodiment）

16 guide grooves

21 vane members（21a~21i）

21x base end parts

21y leading sections

21r pinch off blade（The elastic component of the 3rd embodiment）

21t spring members（The elastic component of the 4th embodiment）

22 the 1st pin-shaped projections（Guiding pin）

23 the 2nd pin-shaped projections（Action pin）

31 driving rings

32 flanges

33 the 2nd slotted eyes

34 engaging protrusions

35 driven tooths

36 resin plates（The elastic component of the 2nd embodiment）

36x cuts flexure strip

41 the 2nd substrates（Pressing plate）

42 reinforcing plates

46 mounting seats

Claims (10)

1. a kind of light amount adjusting device, by multiple vane members being adjusted by light quantity to optical axis opening, it is characterised in that： Possess substrate, multiple vane members, driving ring, driver element and the elastic component of ring-type；

The substrate of the ring-type has optical axis opening in central part；

The plurality of vane member is configured in around the optical axis opening, overlapped in squamous in circumferencial direction；

The driving ring to clip the plurality of vane member between the substrate in the way of configure, each vane member is carried out Move openingly and closingly；

The driver element makes the driving ring rotate centered on the optical axis opening,

The elastic component is arranged on the position with the plurality of vane member face-off between the substrate and the driving ring,

The elastic component is made up of the film member for having ring-type springy, and the film member of the ring-type is configured in the base Between plate and each vane member, by the stage portion for being formed on the substrate the film member of the ring-type is deformed, so as to The plurality of vane member is pushed to the driving ring side from the inner circumferential side of the film member of the ring-type,

Or, the film member of the ring-type is configured between the driving ring and each vane member, described by being formed in Stage portion in driving ring deforms the film member of the ring-type, so as to by the inner circumferential side of the film member of the ring-type by institute State multiple vane members to be pushed to the substrate-side.

2. light amount adjusting device according to claim 1, it is characterised in that：The driving ring is by with the optical axis opening Center is connected in the way of predetermined angular carries out circular motion with the driver element,

Between each vane member and the substrate,

The 1st projection is set, 1st slotted eye chimeric with its is set in the opposing party in a side；

Between each vane member and the driving ring,

The 2nd projection is set, 2nd slotted eye chimeric with its is set in the opposing party in a side,

1st projection is chimeric with the 1st slotted eye, and the 2nd projection is chimeric with the 2nd slotted eye,

1st slotted eye and the 2nd slotted eye are formed as making each vane member opening by regulation by the circular motion of the driving ring Close the shape that track is opened and closed to the optical axis opening.

3. light amount adjusting device according to claim 2, it is characterised in that：On each the plurality of vane member, Face side arranges the 1st projection, overleaf side setting the 2nd projection,

Formed on the substrate with the 1st slotted eye of the 1st protrusions snap, be formed in the 2nd slotted eye of the 2nd protrusions snap described In driving ring.

4. light amount adjusting device according to claim 3, it is characterised in that：1st slotted eye is by movably guiding The slotted eye of the slit-shaped of the 1st projection is formed, and the 2nd slotted eye is by the axis hole shape for rotatably supporting the 2nd projection Slotted eye formed, the film member of the ring-type is configured between the substrate and each vane member, formed and the substrate The face-off of 1st slotted eye, same general shape slotted eye.

5. light amount adjusting device according to claim 3, it is characterised in that：1st slotted eye is by rotatably supporting The slotted eye of the axis hole shape of the 1st projection is formed, and the 2nd slotted eye is by the slit-shaped for movably guiding the 2nd projection Slotted eye formed, the film member of the ring-type is configured between the driving ring and each vane member, formed and the driving The the face-off of the 2nd slotted eye of ring, the slotted eye of same general shape.

6. light amount adjusting device according to claim 1, it is characterised in that：The plurality of vane member is by 6～18 Vane member is constituted,

The film member for making the ring-type being configured between the substrate or the driving ring and the vane member is produced The stage portion of elastic deformation, by the few quantity of the piece number than the vane member in the periphery of the optical axis opening by substantially Equal intervals are configured.

7. a kind of light amount adjusting device, by multiple vane members being adjusted by light quantity to optical axis opening, it is characterised in that： Possess substrate, multiple vane members, driving ring, driver element and the elastic component of ring-type；

The substrate of the ring-type has optical axis opening in central part；

The plurality of vane member is configured in around the optical axis opening, overlapped in squamous in circumferencial direction；

The driving ring to clip the plurality of vane member between the substrate in the way of configure, each vane member is entered Row is moved openingly and closingly；

The driver element makes the driving ring rotate centered on the optical axis opening,

The elastic component is arranged on the position with the plurality of vane member face-off between the substrate and the driving ring,

The elastic component is made up of the film member for having ring-type springy, and the film member of the ring-type is configured in the base Between plate and each vane member, the thin film of the ring-type is made by the flexure strip that cuts being formed on the film member of the ring-type The deformation of member, so as to be carried out the plurality of vane member to the driving ring side from the inner circumferential side of the film member of the ring-type Push,

Or, the film member of the ring-type is configured between the driving ring and each vane member, described by being formed in The flexure strip that cuts on the film member of ring-type deforms the film member of the ring-type, so as to by the film member of the ring-type Inner circumferential side the plurality of vane member is pushed to the substrate-side.

8. light amount adjusting device according to claim 7, it is characterised in that：The plurality of vane member is by 6～18 Vane member is constituted,

It is described to cut the ring-type that flexure strip makes to be configured between the substrate or the driving ring and the vane member Film member elastic deformation, it is described to cut flexure strip by the few quantity of the piece number than the vane member in the optical axis opening Periphery by it is roughly equal interval configured.

9. a kind of lens subassembly, it is characterised in that possess：

The imaging len that light from subject is imaged, and

The light amount adjusting device being configured on from the subject to the light path of imaging len,

The light amount adjusting device is the light amount adjusting device described in claim 1.

10. a kind of optical device, possesses lens subassembly and light receiving unit；

The lens subassembly has the imaging len being imaged to the light from subject and to by the light quantity of the imaging len The light amount adjusting device being adjusted；

The light receiving unit receives to be adjusted by the light amount adjusting device, by the light quantity of photographic lenss；

It is characterized in that：The lens subassembly is the lens subassembly described in claim 9.